Hormonal
Multiple-set low-intensity resistance exercise (20% 1RM) combined with continuous blood flow restriction (BFR) achieves intramuscular metabolic stress and fast-twitch fiber recruitment equivalent to high-intensity resistance exercise (65% 1RM).
If you cannot lift heavy weights due to injury, age, or joint pain, try low-weight resistance exercises (20% of your max) while using a blood flow restriction cuff. Keep the cuff on continuously, even during rest periods between sets. This method creates the same metabolic stress and muscle fiber recruitment as heavy lifting, allowing for effective training with minimal joint stress.
In conclusion, the multiple sets of low-intensity resistance exercise with continuous BFR could achieve with the same metabolic stress as multiple sets of high-intensity resistance exercise.
Why this rating
Randomized crossover design with objective 31P-MRS measurements, but small sample size (n=12) and young healthy subjects limit generalizability.
Source
Effect of multiple set on intramuscular metabolic stress during low-intensity resistance exercise with blood flow restriction
Tadashi Suga et al. · European Journal of Applied Physiology · 2012
DOI 10.1007/s00421-012-2377-x
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